AITRICrLID^. 21 



y. With no, or a very indistinct, second parietal plait. 

 8. Smaller, blackish-brown ; last whorl more distinctly angu- 

 lated above. Length 13|, breadth 9 mill. 



Hah. West Indies, Cuba, Jamaica, Portorico, Guadaloupe ; 

 Labrador, Mexico, Cayenne. 



21. Melampus obliqtjus. 



Shell obconic, reddish-brown, rather thick ; spire very slightly 

 elevated ; whorls eight to nine, wrinkled across; labium with two 

 very distinct teeth, and an intermediate and equidistant slight ob- 

 tuse prominence ; inferior tooth very oblique, terminating at the 

 base ; labrum with about three teeth or striae, which terminate 

 on the margin ; base of the aperture a little contracted by the 

 basal tooth. Length more than ^_ inch. {Say.) 



Melampus obliquus, Say in Philad. Journ. ii. p. 377. 

 Beck, Intl. p. 107. n. 8. 

 Pfr. Syn. Auric, n. 18 ; Mon. Auric, p. 30. 



Hab. South Carolina. 



22. Melampus castaneus. B.M. 



Shell subrimate, oblong-ovate, solid, very indistinctly striated, 

 slightly shining, dark chestnut-coloured, sometimes with a pale 

 band near the base ; spire short, conoidal, slightly mucronate ; 

 suture impressed; whorls seven, the upper ones narrow, rather 

 flattened, the last forming nearly four-fifths of the total length, 

 gradually attenuated towards the base ; aperture almost per- 

 pendicular, narrow, scarcely dilated in front ; parietal plaits two, 

 below the middle, the upper one stronger ; columellar plait rather 

 oblique ; peristome simple, sharp ; right margin slightly arcuate, 

 furnished within with a deeply situated whitish callus, which 

 sends off seven transverse ridges ; columellar margin rather 

 thickened, somewhat spreading. Length 15, greatest breadth 

 9f miU. 



Voluta castanea, 3fiihlfeld in May. Ges. Nat. Fr. Berl. viii. 1818, 

 p. 4. t. 1. f. 2. 



Conovulus fuscus, Philippi in lit. 



Conovulus leucodon, A. Adams in Voy. Samarany, Moll. Introd. 

 p. 5. 



Auricula fusca, Kiist. Auric, p. 38. t. 5. f. 18-20. 



Auricula castanea, Phil, in Zeitschr. f. Moll. 1851, p. 54. 



Melampus lugubris, Beck, Ind. p. 106. n. 2 ? 



Melampus leucodon, "Beck" A. Adams and Reeve, Voy. Sama- 

 rany, Moll. p. 55. pi. 14. f. 17. 



Melampus fuscus, M. E. Gray, Fiq. Moll. Anim. pi. 304. f. 1 

 (ex Soul. Voy. Bonite, pi. 29. f. 24-20). 



